# https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/
sudo apt-get install gnupg
wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add -
# for Ubuntu 20.04
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list
sudo apt-get update
sudo apt-get install -y mongodb-org
# if you get "mongodb-org-mongos : Depends: libssl1.1 (>= 1.1.1) but 1.1.0l-1~deb9u6 is to be installed" error
# https://stackoverflow.com/questions/50375979/getting-error-while-installing-mongodb-in-linux
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1-1ubuntu2.1~18.04.20_amd64.deb
sudo dpkg -i libssl1.1_1.1.1-1ubuntu2.1~18.04.20_amd64.deb
sudo apt-get install -y mongodb-org